Finding the Fourth Proportional to 12,684.30, 17,510.46 and 8,442.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,684.30 : 17,510.46 = 8,442.42 : x
2. Step 2: Convert to fraction form
   12,684.30/17,510.46 = 8,442.42/x
3. Step 3: Cross multiply
   12,684.30x = 17,510.46 × 8,442.42
4. Step 4: Simplify right side
   12,684.30x = 147,830,657.71
5. Step 5: Solve for x
   x = 147,830,657.71/12,684.30
6. Step 6: Final answer
   x = 11,654.62